Improvement in spring bed-bottoms



A.,W'. OBERMANN. .SPRING BED Bow'rous.

Patented Nov. '7, 1876.

ffy/M10.

UNITED STATES PATENT OFFICE.

AUGUST W. OBERMANN, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN SPRING BED-BOTTO'MS.

Specification forming part of Letters Patent No. 184,104, dated November 7, 1876; application iled October 19, 1874.

To all whom it may concern:

Beit known that I, AUGUST W. OBEEMANN, of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Spring Bed-Bottom, of which the following is a specification:

' The nature of my invention relates to an improvement lin spring bed-bottoms, of that class which have upper and lower frames joined together; and it consists, in the coinbination with the two frames, ofthe adjustable screw-bolts at the corners thereof, each having a spiral spring sleeved 011 it to afford a yielding support to the upper frame, as here inat'ter explained.

The drawing represents my bed-bottom in perspective.

In the drawing, A represents four metal bars, joined at their ends by the diagonal corner-pieces A1, the whole forming the lower frame. B is the upper fralnecomposed oi' four light metal bars, and has a covering of interlaced wires, a. Across the lower frame four intermediate metal slats, A2, extend-two near the middle of the bed, and one at either side oi' them. On these slats inverted conical spiral springs C are placed, and support the wire netting ot' the upper frame, to which they are secured, being so disposed or grouped as to alord a stiffer support under the hips of an occupant, the point under which a spring-bed is most likely to sag. D is a metallic bolsterframe, pivoted to the sides ot' the upper frame at b. Near the head end ot' each sidle bar oi' the bolster-frame D there is secured a pendent quadrant,f, which plays through a slot in the side rail oi' the frame B below. A plate with a slot between a pair ot' lugs is riveted to the frame over the quadrant slot; and in one oi' said lugs a set-screw, g, is tapped through toimpinge upon the quadrant, force it against the other lug, and thus secure it in any position., so that the bolster-frame can have any desired angle of inclination.

c, passing down through the corner of the lower frame, where it receives a screwnut, d. A spring, c, spirally coiled about the bolt is inlerposed between the upper and lower frames.

What I claim as my invention, and desire to secure by Letters Patent, is

In a spring bed-bottom, the combination, with the upper and lower frames, ot' the bolt c, screw-nut d, and spring @operating in the manner specified.

AUGUST W. OBERMANN.

Witnesses;

WM. H. LoTz, HERMAN A. KEOESGHELL.

At each corner i ofthe upper frame is secured a pendent bolt, 

